Den is the Rockbell family pet. It is apparent that he lost his front left leg by unknown means prior to the start of the series.

Vital statistics
Aliases Unknown
Birthplace Resembool, Amestris
Date of Birth Unknown
Age Unknown
Family Unknown
Affiliations Unknown
Alignment Unknown
Species Dog
Occupation Pet Dog
Rank Unknown
Abilities Loyalty
Power Level 2
Weapons Teeth
Unique Trait Automail front leg
Goal Unknown
First Appearance Unknown
Voice Actor Eddie Murphy (FUNimation Dub)

Merwin Mondesir (Saban Dub)

Seiyū None